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Design of a Crossflow Attenuated Natural Laminar Flow Flight Test ArticleA natural laminar flow test article has been designed and analyzed for a flight test at the NASA Armstrong Flight Research Center using the F-15 aircraft with Centerline Instrument Pylon (CLIP) testbed. The flight test aims to experimentally validate the new Crossflow Attenuated Natural Laminar Flow (CATNLF) design method in a flight environment. The CATNLF design method uses geometry shaping to produce specific pressure distributions that enable laminar flow on vehicle components with high sweep and high Reynolds numbers by attenuating the crossflow growth that typically leads to premature transition on such components. The CATNLF test article, which will be mounted vertically below the F-15 for flight testing, is designed to be representative of a transonic transport wing and accounts for transition mechanisms due to crossflow, Tollmien-Schlichting, and attachment line transition instabilities. The test article is predicted to support 53% surface area of laminar flow on the suction-side at the design point and maintains significant laminar flow extents at near-cruise, off-design conditions. The design was performed, flight matrix selected, and instrumentation chosen with two primary test goals in mind: to confirm the effectiveness of the CATNLF method in attenuating crossflow growth on a representative transonic transport wing, and to investigate surface requirements needed for laminar flow applications.
Document ID
20205009944
Acquisition Source
Langley Research Center
Document Type
Conference Paper
Authors
Michelle N. Lynde
(Langley Research Center Hampton, Virginia, United States)
Richard L. Campbell
(Langley Research Center Hampton, Virginia, United States)
Brett R. Hiller
(Langley Research Center Hampton, Virginia, United States)
Lewis R. Owens
(Langley Research Center Hampton, Virginia, United States)
Date Acquired
November 10, 2020
Subject Category
Aerodynamics
Meeting Information
Meeting: AIAA SciTech Forum
Location: Online
Country: US
Start Date: January 11, 2021
End Date: January 15, 2021
Sponsors: American Institute of Aeronautics and Astronautics
Funding Number(s)
WBS: 081876.02.07.50.15.01.02
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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